Chrestos means good.

This latter version with the word Chrēsto, not Christo, is what our earliest extant manuscripts relate. Contrary to what Christian apologist Josh McDowell and other fundamentalists assert, and despite the fact that the two words are evidently related through the roots χρίω and χράω, "Chrēsto," the ablative of Chrestus, is not an "another spelling of Christ." These terms represent Latinizations of two different Greek words that sound quite similar: Chrēstos, sometimes a proper name, means "good," "righteous" or "useful"; while Christos denotes "anointed" or "messiah." Hence, although an earlier generation of scholars believed that this Suetonian passage reflected the uprisings of Jews against Christians in Rome, we are not certain at all that this purported "reference" in Suetonius has anything to do with Christ and Christians.